Piston-rod packing.



PATENTED MAR. 31, 1903..

G. P. ALLEN. PIsToN Ron PACKING;

APPLIOA-TION FILED MAY 19. 1902.

H0 MODEL UNITED STATES PATENT OFFICE.

GEORGE F. ALLN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO HOYTMETAL COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION.

Pl-sToN-Roo PACKING.

SPECIFICATION forming part of Letters Patent N o. 724,074, dated March 31, 1903.

Application tiled May 19, 1902.

To @ZZ whom t may concern:

Be it known that I, GEORGE FRANKLIN AL- LEN, a citizen of the United States, residing in the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Piston-Rod Packing, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to a packing for piston-rods, the object of the invention being to provide a construction wherein' the metal rings only will have bearing against the pistou-rod and also whereby they are constantly held to the rod as a result of their configuration and bearing contact.

My invention consists in features of novelty hereinafter fully described, and pointed out in the claims.

Figure I is a longitudinal section of a piston-rod packing constructed in accordance with my invention. Fig. II is a cross-section taken on line II II, Fig. I. Fig. III is a perspective view of two of the mating intermediate packing-sections. Fig. IV is a perspective view of one-half of the central master-ring with a binding-wire associated therewith. v

1 designates a piston-rod mounted in the packing-box 2, that is provided with a gland 3, held to the packing-box by bolts 4 in the usual manner.

5 designates outer sectional master-rings, each ring being preferably composed of two members that are held together by bindingwires 6. The master-rings 5 are situatedf at the ends of the packing on the piston-rod'l, and each of said rings is provided' with an outer tapering face Zand an inner tapering face 8 upon their inner sides.

9 is a central sectional master-ring, the sections of which are held together by a binding-wire 10. This central master-ring is provided upon both sides with outer inclined faces 1l and inner inclined faces '12. (See Figs. I and IV.)

13 designates sectional intermediate packing-rings each composed of a series of members, preferably three, that are held assemi serial No. 108,038.. (Nie mbar-,1.)

bled by winding-Wires 14. Each packingring13 is provided with a dat face 15, that 4is adapted to receive the mating packing-ring, as seen in Fig. I, and each of said rings is provided with a tapered face 16, that is adapted to seat against the inclined inner face 8 of an outer master-ring or an inclined Vinner face l2 of the centralmaster-ring which it opposes. A

From the foregoing it will be seen that the tapered faces 16 of thepacking-rings 13 are securely held between the inclined faces 8 and12 ofthe master-rings in pairs, so that each pair of packing-rings Will be forced inwardly to the piston-rod by the master-rings and held thereto by reason of the inclined contact between saidparts. The arrangement of the master-rings with their inclined faces and the packing-rings between them, so that their tapered faces bear against the inner inclined faces of the master-rings, provides a socket-bearing between the parts that permits a freedom of movement of the packing-rings between the master-rings', whereby the packing-rings are-held projected toward the piston -rod with ease and certainty, so

that they will constantlytend to approach the piston-rod both when the parts are originally assembled and also thereafter in the practical use of the packing. Y.

17 designates pliable rings that are interposed between the master-rings and the packing-rings to occupy positionsbetween the outer inclined faces vof said master-rings and the coincident tapering faces of the packing.- rings. These pliable rings permit a limited movement of the packing-rings 13 with respect to the master-rings between which they are situated, so that said packing-rings may partake of a rocking movement to a limited degree to cause them to be constantly carried inwardly toward the piston-rod by the pressure of the master-rings thereagainst through the bearing provided by the inner inclined faces of the said rings. n

l. In a piston-rod packing, the combination of a series of master-rings having inner and outer inclined faces at their sidesand packing-rings situated between said master-rings and 'having tapering faces adapted to bear against said inner inclined faces of the master-rings, substantially as described.

2. In a piston-rod packing, the combination of a series of master-rings having inner and outer inclined faces at their sides, packingrings situated between said master-rings, and having tapering faces adapted to bear against said inner inclined faces of the master-rings, and pliable packing-rings arranged between the outer inclined faces of said master-rings and said packing-rings, substantially as described.

3. In a piston-rod packing, the combination of a pair of outer master-rings having inclined 15 faces upon their opposing sides, a central master-ring having an inner inclined face on each of its sides, and pairs of packing-rings situated between said outer master-rin gs and said central master-ring, said packing-rings zo having tapered faces adapted to bear against the inclined faces of said outer and central master-rings, substantially as described.

E. S. KNIGHT, INI. P. SMITH. 

